KR101637174B1 - Display device with integrated touch screen - Google Patents

Display device with integrated touch screen Download PDF

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Publication number
KR101637174B1
KR101637174B1 KR1020140080754A KR20140080754A KR101637174B1 KR 101637174 B1 KR101637174 B1 KR 101637174B1 KR 1020140080754 A KR1020140080754 A KR 1020140080754A KR 20140080754 A KR20140080754 A KR 20140080754A KR 101637174 B1 KR101637174 B1 KR 101637174B1
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KR
South Korea
Prior art keywords
touch
driving mode
touch driving
electrodes
display
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KR1020140080754A
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Korean (ko)
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KR20160002481A (en
Inventor
최윤종
권극상
박승철
조남균
Original Assignee
엘지디스플레이 주식회사
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Priority to KR1020140080754A priority Critical patent/KR101637174B1/en
Publication of KR20160002481A publication Critical patent/KR20160002481A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/32Means for saving power
    • G06F1/3203Power management, i.e. event-based initiation of power-saving mode
    • G06F1/3234Power saving characterised by the action undertaken
    • G06F1/325Power saving in peripheral device
    • G06F1/3262Power saving in digitizer or tablet
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/04166Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Abstract

The present invention provides a liquid crystal display comprising: a panel including a plurality of electrodes, the panel being divided and driven in a display driving mode and a touch driving mode for one frame period; A display driver IC for applying a common voltage to a plurality of electrodes during a display driving mode; And a controller for applying a touch scan signal for detecting whether or not a touch input is performed to all the plurality of electrodes when the touch driving mode is the first touch driving mode and for sensing the touch input position when the touch driving mode is the second touch driving mode The number of times that the touch scan signal is applied to all of the plurality of electrodes during one frame period in the first touch driving mode is the same as the number of times that the touch scan signal is applied to all the plurality of electrodes in the second touch driving mode The touch screen integrated display device is characterized in that the touch scan signal is smaller than the number of times the touch scan signal is applied to all of the plurality of electrodes during one frame period.

Description

DISPLAY DEVICE WITH INTEGRATED TOUCH SCREEN [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a touch screen integrated display device.

2. Description of the Related Art [0002] As an information-oriented society develops, there have been various demands for display devices for displaying images. Recently, liquid crystal displays (LCDs), plasma display panels (PDPs) Various display devices such as an OLED (Organic Light Emitting Diode Display Device) and the like are being utilized.

Such a display device provides a touch-based input method that allows a user to easily input information or commands intuitively and conveniently without using a conventional input method such as a button, a keyboard, and a mouse.

In order to provide such a touch-based input method, it is necessary to grasp the presence or absence of a user's touch and accurately detect touch coordinates.

To this end, touch sensing is provided by employing one of various touch methods such as a resistance film type, a capacitance type, an electromagnetic induction type, an infrared type, and an ultrasonic type. Among these capacitance methods, A touch capacitance, and a capacitance between a touch electrode and a pointer such as a finger or the like through a plurality of touch electrodes (e.g., a horizontal electrode, a vertical electrode) Many methods are adopted.

In general, the touch driving mode may be divided into an idle mode for confirming whether a touch is input or an active touch for sensing a touch input position. That is, it is driven in the idle mode to detect whether the panel is touch input or in an active touch mode in order to sense the touch input position when the touch input occurs while driving in the idle mode.

However, in a general touch screen, there is no difference in driving in the idle mode and the active mode touch mode, and the panel performs a touch operation in the idle mode as in the active mode, thereby consuming unnecessary power.

Hereinafter, the above-mentioned problems will be described with reference to Figs. 1 and 2. Fig.

FIG. 1 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a general touch screen display device. Referring to FIG.

In a general touch screen display device, a touch scan signal is continuously applied through the ROIC in the touch active driving mode and the touch idle driving mode, as shown in FIG.

1, it is possible to sense the electrodes # 1 to # 6 twice in total in the touch active driving mode. In other words, in the example of FIG. 1, a touch scan signal is applied to all the electrodes twice in total in the touch active driving mode within one frame period. In the touch idle drive mode, the electrodes # 1 to # 6 can be sensed once in total. In other words, in the example of FIG. 1, a touch scan signal is applied to all the electrodes one time in the touch idle drive mode within one frame period

As described above, in the touch idle drive mode, the frequency at which the touch scan signal is applied is lowered to reduce the number of sensing times of the entire panel. Compared to the touch active drive mode, the ROIC is always ON even in the touch idle drive mode. There is a problem that the overall power consumption is not reduced even if the touch idle mode continues.

2 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a general touch screen integrated display device.

Here, the touch screen integrated type display device represents an in-cell type touch screen. The display driving and touch driving are divided into time division driving for one frame and used for driving the existing display The common electrode is utilized as a touch electrode in the above-described touch driving section.

2, in a general touch screen integrated type display device, a touch scan signal is continuously applied through a ROIC in a touch driving mode such as a touch active driving mode and a touch idle driving mode, as shown in FIG.

In other words, since the embodiment of FIG. 2 is an embodiment related to a general touch screen type integrated display device, as described above, the display drive and the touch drive are divided into the time division drive for one frame, In the touch driving mode, the touch scan signal is continuously applied through the ROIC.

2, in the touch active driving mode of the touch driving mode, the electrodes # 1 to # 6 can be sensed twice in total. In other words, in the example of FIG. 1, a touch scan signal is applied to all the electrodes twice in total in the touch active driving mode within one frame period. In the touch idle drive mode, the electrodes # 1 to # 3 can be sensed twice in total, or in the touch idle drive mode, the electrodes # 1 to # 3 are sensed once, Can be sensed once in total.

In the touch idle driving mode, the frequency at which the touch scan signal is applied is lowered to reduce the sensing frequency of the entire panel. In the touch idle driving mode, as in the touch active driving mode, State, the touch idle mode continues even in the touch driving mode of the in-cell type touch screen according to the embodiment of FIG. 2, so that the overall power consumption is not reduced.

The present invention provides a touch screen integrated type display device capable of reducing power consumption in a touch idle drive mode.

According to another aspect of the present invention, there is provided a touch screen integrated type display device comprising: a panel including a plurality of electrodes and divided and driven in a display driving mode and a touch driving mode for one frame period; A display driver IC for applying a common voltage to a plurality of electrodes during a display driving mode; And a controller for applying a touch scan signal for detecting whether or not a touch input is performed to all the plurality of electrodes when the touch driving mode is the first touch driving mode and for sensing the touch input position when the touch driving mode is the second touch driving mode The number of times that the touch scan signal is applied to all of the plurality of electrodes during one frame period in the first touch driving mode is the same as the number of times that the touch scan signal is applied to all the plurality of electrodes in the second touch driving mode The touch scan signal is smaller than the number of times the touch scan signal is applied to all of the plurality of electrodes during one frame period.

Here, the first touch driving mode is an idle driving mode, the second touch driving mode is an active driving mode, and in a first touch driving mode, a touch scan signal is applied to all the plurality of electrodes And in the second touch driving mode, the touch scan signal is applied to all the plurality of electrodes twice or more during one frame period.

As described above, in the touch idle driving mode, the touch driving is performed only for a minimum time to detect whether or not the touch input is performed, thereby reducing power consumption compared to the conventional case.

According to embodiments of the present invention, the number of times the touch scan signal is applied during one frame period in the integrated touch-screen display device is different according to the touch active driving mode and the touch idle driving mode to reduce power consumption in the touch idle mode There is an effect that can be.

1 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a general touch screen display device;
2 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a general touch screen integrated display device;
3 is a diagram illustrating a configuration of a touch screen integrated display device according to an embodiment of the present invention; And
4 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a touch screen integrated display device according to an exemplary embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When it is stated that a component is connected, coupled or connected to another component, the component may be directly connected to or connected to the other component, but other components may be interposed between the respective components, It is to be understood that the elements may be connected, coupled or connected through other components.

3 is a diagram illustrating a configuration of a touch screen integrated display device according to an embodiment of the present invention.

A touch screen integrated type display device according to an embodiment of the present invention includes a panel, and the panel includes a TFT substrate and a C / F (color filter) substrate formed with a liquid crystal layer sandwiched therebetween.

In other words, in the panel 100, a plurality of data lines 310 are formed in a first direction (e.g., a longitudinal direction of the panel), and a plurality of gate lines 210 are formed in a second direction And a plurality of pixels (not shown) are defined due to the intersection of the plurality of data lines 310 and the plurality of gate lines 210.

A transistor having a source electrode or a drain electrode connected to the data line, a gate electrode connected to the gate line, and a drain electrode or a source electrode connected to the pixel electrode is formed in the pixel region of each pixel.

When the driving mode of the panel is the touch driving mode, the panel 100 is driven by a touch electrode that senses the touch input of the panel according to the applied touch scan signal. When the driving mode of the panel is the display driving mode, A plurality of electrodes 110 driven by a common electrode for displaying an image by forming an electric field with a pixel electrode formed on the panel according to an applied common voltage are formed. The plurality of electrodes may be formed on the TFT substrate of the panel, but may also be formed on the C / F substrate of the panel.

The panel 100 may be divided into a display driving mode and a touch driving mode for one frame period using a plurality of electrodes that function as a touch electrode and a common electrode in accordance with a driving mode of the panel, But also can act as a touch screen panel (TSP: Touch Screen Panel).

That is, the panel 100 may be a panel in which a display panel and a touch screen panel are integrated into one, or a display panel in which a touch screen panel (TSP) is built in an in- .

Next, a touch screen integrated type display device according to an embodiment of the present invention may further include a back surface resistance film 150 on a plurality of electrodes 110 as shown in FIG. Here, the backside resistance film is formed in contact with the upper portion of the CF substrate constituting the panel, and can be formed by AS Pol and Y1 Coating. In particular, the backside resistance film 150 of the present invention may be formed of a transparent electrode such as ITO. In the touch driving mode, the backside resistance film 150 may receive a signal corresponding to a touch scan signal or a touch scan signal and may generate parasitic capacitance .

3, the display driver IC includes a gate driver 200, a data driver 300, and a common voltage generator 300. The display driver IC includes a gate driver 200, a data driver 300, And a generating unit. Here, the common voltage generating unit may be formed inside the gate driving unit or the data driving unit, or may be formed separately on the outside or inside of the panel as a separate component.

That is, when the driving mode of the panel is the display driving mode, the gate driving unit 200 for sequentially supplying the scanning signals to the plurality of gate lines, the data driving unit 300 for supplying the data voltages to the plurality of data lines, And a common voltage generator for applying a common voltage to the plurality of electrodes during the operation.

Here, when the driving mode of the panel 100 is the display driving mode, the gate driver 200 sequentially applies a scan signal (Scan Signal) for display to the plurality of gate lines 210.

That is, the gate driver supplies a gate signal, which is a scan signal for display purposes, to the gate lines, and applies a data voltage to the pixels of the panel during the display period.

For example, the gate driver supplies a gate signal to the gate lines to select a line of a panel to which a data voltage is input, and the pixels of the panel respond to a gate signal to output a data voltage Vdata ).

The data driver 300 applies the display data voltage Vdata to the plurality of data lines 310 when the driving mode of the panel 100 is the display driving mode.

That is, the data driver 300 converts the RGB data input from the timing controller (not shown) into a data voltage and outputs the data voltage. The data voltage output from the data driver is supplied to the data lines 310. [

In other words, a sampling start signal is generated by shifting a source start pulse (SSP) from a timing controller (not shown) according to a source shift clock (SSC). Then, the pixel data RGB (image data) inputted in accordance with the source shift clock SSC is latched in accordance with the sampling signal to be changed into a data signal, and then, in response to the source output enable (SOE) signal And supplies a data signal to the data lines in units of horizontal lines. The data signal includes a data voltage.

For this, the data driver 300 may include a data sampling unit, a latch unit, a digital-analog converter, and an output buffer. The data driver 300 may include an ROIC.

The common voltage generator generates a common voltage, applies the generated common voltage to all the plurality of electrodes of the panel during the display driving mode, and the common electrode and the pixel electrode form an electric field due to the applied common voltage, .

For reference, the above-mentioned timing controller has timing (timing) such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, and a main clock CLK input from a system unit And generates control signals GCS and DCS for controlling the operation timings of the gate driving unit 200 and the data driving unit 300 and rearranges the RGB data inputted from the system unit (not shown) And outputs the RGB data to the data driver 300.

Next, a touch screen integrated type display device according to an embodiment of the present invention includes a ROIC. The ROIC may be formed inside the gate driver or may be formed outside the gate driver and the data driver, depending on the size and shape of the panel, or may be formed inside the data driver 300 or in a one chip form with the data driver.

The ROIC described above applies a touch scan signal to all or a part of the plurality of electrodes 110 when the driving mode of the panel 100 is the touch driving mode. Here, the touch scan signal is referred to as a touch sensing signal or a touch sensing voltage or a touch driving voltage (Vtd: Touch Voltage).

For example, when the driving mode of the panel 100 is the touch driving mode, the ROIC applies a touch scan signal to a plurality of electrodes. Here, the ROIC may apply a touch scan signal to all or a part of a plurality of electrode groups when a plurality of electrodes are grouped.

The touch driving mode according to an embodiment of the present invention is divided into a touch idle driving mode and a touch active driving mode. That is, an idle driving mode and a touch And an active driving mode for detecting an input position.

According to the two touch driving modes, when the touch driving mode is the idle driving mode, the ROIC according to an embodiment of the present invention applies a touch scan signal for detecting whether or not the touch input is performed to all the plurality of electrodes, When the touch driving mode is the active driving mode, a touch scan signal for sensing the touch input position is applied to all the plurality of electrodes to detect the touch input position of the panel.

Particularly, in the idle driving mode, the number of times that the touch scan signal is applied to all of the plurality of electrodes during one frame period is less than the number of times that the touch scan signal is applied to all the plurality of electrodes during one frame period in the active driving mode As shown in FIG.

For example, in the idle driving mode, the touch scan signal is applied once to all the plurality of electrodes during one frame period, and in the active driving mode, the touch scan signal is applied to all the plurality of electrodes It can be applied more than once.

In the touch screen integrated display device according to an embodiment of the present invention, the number of times the touch scan signal is applied in the idle driving mode is reduced to reduce power consumption, and the driving time in the touch idle mode is reduced Instead, the display driving time is increased to improve the quality of an image during driving of the display.

In addition, the ROIC receives sensing data (e.g., capacitance, capacitance change, voltage, etc.) measured by the ROIC according to a touch scan signal applied to a plurality of electrodes 110 serving as a touch electrode, And may further include a touch controller (not shown) or the like for this operation.

In other words, the touch controller receives a feedback signal corresponding to a touch scan signal for sensing whether a touch input is made and a feedback signal corresponding to a touch scan signal for sensing a touch input position, i.e., sensing data from a plurality of electrodes, And performs an operation to detect whether or not the touch input is performed.

Meanwhile, the panel 100 of the touch screen integrated type display device according to the embodiment is driven while repeating the display driving mode and the touch driving mode. The timing of the display driving mode and the touch driving mode is controlled by the timing controller And may be controlled by interlocking the timing controller and the touch controller in some cases.

The ROIC may apply the touch scan signal through the data driver 300 or the gate driver 200 when the touch scan signal is applied to all or a part of the plurality of electrodes 110 . In FIG. 3 of the present invention, a touch scan signal is applied through the data driver, but the present invention is not limited thereto.

For reference, a common voltage generated in the common voltage generator for driving the display and transmitted to the plurality of electrodes is also transmitted to each of the plurality of electrodes through the signal line 320.

The formation direction of at least one signal line connected to each of the plurality of electrodes may vary depending on which of the data driver and the gate driver transmits the touch scan signal and the common voltage.

However, when the touch scan signal or the common voltage is transmitted to the plurality of electrodes through the gate driving unit, the signal lines connecting the gate driving unit and the plurality of electrodes may be formed in parallel to the direction in which the plurality of gate lines are formed have.

In this way, a signal line for transmitting the touch scan signal generated in the ROIC to the plurality of electrodes through the data driver or the gate driver is configured.

Such a signal line 320 may be formed in a region of the TFT substrate of the panel corresponding to the region of the black matrix formed on the C / F substrate of the panel 100 in order to prevent the aperture ratio from being reduced.

When the plurality of electrodes 110 and each signal line are connected by two or more contact holes, the effect of reducing the resistance between the plurality of electrodes and the signal line can be obtained.

The operation of the ROIC in the operation of the touch screen integrated display device according to an embodiment of the present invention will be described in detail with reference to FIG.

4 is a diagram illustrating application of a touch scan signal in an idle mode and an active mode in a touch screen integrated display device according to an embodiment of the present invention.

As shown in FIG. 4, in the touch active driving mode of the touch driving mode, the electrodes # 1 to # 6 are sensed twice in total. In other words, a touch scan signal is applied to all of the electrodes twice in total in the touch active driving mode within one frame period. In the touch idle drive mode, the electrodes # 1 to # 6 are sensed once in total.

In the touch screen integrated display device according to an embodiment of the present invention, the display driving mode and the touch driving mode may be alternatively divided and driven during one frame period.

Particularly, in the present invention, the display driving mode and the touch active driving mode are alternately divided and driven twice. In this way, the ROIC maintains the ON state when driven in the touch active driving mode for one frame, and the ROIC maintains the OFF state when driven in the display driving mode.

However, in the touch idle driving mode, the ROIC maintains the On state only during a period in which the touch scan signal is applied to all the plurality of electrodes during one frame period, and the ROIC maintains the Off state for the remaining periods. This operation can be confirmed in the drawing of the ROIC operation (corresponding to the idle drive mode) of FIG. 4, that is, in the case of the touch idle drive mode, the ROIC can maintain the off state have.

Accordingly, in the idle driving mode, the touch scan signal is applied to all the plurality of electrodes only once during one frame period, rather than maintaining the ROIC for the unconditioned touch driving, even if the display driving mode is Off. It is possible to maintain the ROIC in ON state only in the interval and keep the ROIC in the OFF state in the remaining interval, thereby reducing power consumption.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Panel 110: Electrode
150: backside resistive film 200: gate driver
210: gate line 300: data driver
310: data line 320: signal line

Claims (14)

  1. A panel including a plurality of electrodes and being dividedly driven in at least m times of touch driving modes and at least m times of display driving modes during a predetermined period;
    a display driver IC for applying a common voltage to the plurality of electrodes during the display driving modes repeated m times; And
    (N is a natural number smaller than m) of the touch driving modes, which are repeated m times, when the touch driving modes are the first touch driving modes, And a ROIC for performing touch sensing in m touch driving modes among the touch driving modes repeated m times in case of two touch driving modes,
    Wherein the first touch driving mode is an idle driving mode for detecting whether a touch input is performed and the second touch driving mode is an active driving mode for sensing a touch input position.
  2. delete
  3. The method according to claim 1,
    Wherein the ROIC performs touch sensing by applying a touch scan signal to the plurality of electrodes.
  4. The method of claim 3,
    Wherein when the touch driving mode is the first touch driving mode, the touch scan signal is applied once to all the plurality of electrodes during the predetermined period.
  5. The method of claim 3,
    Wherein when the touch driving mode is the second touch driving mode, the touch scan signal is applied to all the plurality of electrodes at least twice during the predetermined period.
  6. The method according to claim 1,
    When the touch driving mode is the first touch driving mode, only during a touch driving mode in which a touch scan signal among a plurality of touch driving modes generated during the predetermined period is applied to the plurality of electrodes, And the touch screen integrated type display device.
  7. The method according to claim 1,
    Wherein the ROIC is in an off state during a plurality of the display driving modes generated during the predetermined period when the touch driving mode is the second touch driving mode.
  8. The method according to claim 1,
    Wherein the ROIC performs an operation for detecting whether or not touch input of the panel is performed or a touch input position is detected through a feedback signal according to a touch scan signal.
  9. 1. A touch screen integrated display device including a plurality of electrodes and driven by at least m times of touch driving modes and at least m times of display driving modes in a predetermined period,
    (n is an integer greater than or equal to m) among the touch driving modes that are repeated m times when the touch driving modes are the first touch driving modes, and applies a common voltage to the plurality of electrodes during the display driving modes The touch sensing operation is performed in m touch driving modes among the touch driving modes repeated m times when the touch driving modes are the second touch driving modes,
    Wherein the first touch driving mode is an idle driving mode for detecting whether a touch input is performed and the second touch driving mode is an active driving mode for sensing a touch input position.
  10. 10. The method of claim 9,
    And a ROIC for performing touch sensing by applying a touch scan signal to the plurality of electrodes in the first touch driving mode or the second touch driving mode.
  11. delete
  12. 11. The method of claim 10,
    Wherein the ROIC performs an operation for detecting whether or not touch input of a panel is performed through a feedback signal according to the touch scan signal or for detecting a touch input position.
  13. 11. The method of claim 10,
    When the touch driving mode is the first touch driving mode, only during a touch driving mode in which the touch scan signal is applied to the plurality of electrodes among the plurality of touch driving modes generated during the predetermined period, State.
  14. 11. The method of claim 10,
    And the ROIC is in an off state during a plurality of the display driving modes generated during the predetermined period when the touch driving mode is the second touch driving mode.
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KR1020140080754A KR101637174B1 (en) 2014-06-30 2014-06-30 Display device with integrated touch screen
CN201410817370.4A CN105278729B (en) 2014-06-30 2014-12-24 Display equipment with integrated touch screen
US14/584,008 US20150378499A1 (en) 2014-06-30 2014-12-29 Display device with integrated touch screen
US14/852,124 US9740327B2 (en) 2014-06-30 2015-09-11 Display device with integrated touch screen

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
KR20190015159A (en) * 2018-10-29 2019-02-13 경희대학교 산학협력단 Touch sensor in-cell type organic electroluminesence device

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* Cited by examiner, † Cited by third party
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